| 1 | /* gri_defs.h: GRI-909 simulator definitions \r |
| 2 | \r |
| 3 | Copyright (c) 2001-2008, Robert M. Supnik\r |
| 4 | \r |
| 5 | Permission is hereby granted, free of charge, to any person obtaining a\r |
| 6 | copy of this software and associated documentation files (the "Software"),\r |
| 7 | to deal in the Software without restriction, including without limitation\r |
| 8 | the rights to use, copy, modify, merge, publish, distribute, sublicense,\r |
| 9 | and/or sell copies of the Software, and to permit persons to whom the\r |
| 10 | Software is furnished to do so, subject to the following conditions:\r |
| 11 | \r |
| 12 | The above copyright notice and this permission notice shall be included in\r |
| 13 | all copies or substantial portions of the Software.\r |
| 14 | \r |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r |
| 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r |
| 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\r |
| 18 | ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER\r |
| 19 | IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN\r |
| 20 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r |
| 21 | \r |
| 22 | Except as contained in this notice, the name of Robert M Supnik shall not be\r |
| 23 | used in advertising or otherwise to promote the sale, use or other dealings\r |
| 24 | in this Software without prior written authorization from Robert M Supnik.\r |
| 25 | \r |
| 26 | 12-Jan-08 RMS Added GRI-99 support\r |
| 27 | 25-Apr-03 RMS Revised for extended file support\r |
| 28 | 19-Sep-02 RMS Fixed declarations in gdev structure\r |
| 29 | \r |
| 30 | There are several discrepancies between the original GRI-909 Reference\r |
| 31 | Manual of 1969 and the only surviving code sample, the MIT Crystal Growing\r |
| 32 | System of 1972. These discrepancies were clarified by later documentation:\r |
| 33 | \r |
| 34 | 1. Ref Manual documents two GR's at codes 26-27; MITCS documents six GR's\r |
| 35 | at 30-35. Answer: 6 GR's, 26-27 were used for character compares.\r |
| 36 | 2. Ref Manual documents only unsigned overflow (carry) for arithmetic\r |
| 37 | operator; MITCS uses both unsigned overflow (AOV) and signed overflow\r |
| 38 | (SOV). Answer: signed and unsigned.\r |
| 39 | 3. Ref Manual documents a ROM-subroutine multiply operator and mentions\r |
| 40 | but does not document a "fast multiply"; MITCS uses an extended\r |
| 41 | arithmetic operator with multiply, divide, and shift. Answer: EAO\r |
| 42 | is a package of ROM subroutines with just four functions: multiply,\r |
| 43 | divide, arithmetic right shift, and normalize.\r |
| 44 | 4. Is SOV testable even if the FOA is not ADD? Answer: AOV and SOV are\r |
| 45 | calculated regardless of the function.\r |
| 46 | 5. How does the EAO handle divide overflow? Answer: set link.\r |
| 47 | */\r |
| 48 | \r |
| 49 | #include "sim_defs.h" /* simulator defns */\r |
| 50 | \r |
| 51 | /* Simulator stop codes */\r |
| 52 | \r |
| 53 | #define STOP_DEV 1 /* must be 1 */\r |
| 54 | #define STOP_HALT 2 /* HALT */\r |
| 55 | #define STOP_IBKPT 3 /* breakpoint */\r |
| 56 | #define STOP_ILLINT 4 /* illegal intr */\r |
| 57 | \r |
| 58 | /* Memory */\r |
| 59 | \r |
| 60 | #define MAXMEMSIZE 32768 /* max memory size */\r |
| 61 | #define AMASK 077777 /* logical addr mask */\r |
| 62 | #define MEMSIZE (cpu_unit.capac) /* actual memory size */\r |
| 63 | #define MEM_ADDR_OK(x) (((uint32) (x)) < MEMSIZE)\r |
| 64 | \r |
| 65 | /* Architectural constants */\r |
| 66 | \r |
| 67 | #define SIGN 0100000 /* sign */\r |
| 68 | #define INDEX 0100000 /* indexed (GRI-99) */\r |
| 69 | #define DMASK 0177777 /* data mask */\r |
| 70 | #define CBIT (DMASK + 1) /* carry bit */\r |
| 71 | \r |
| 72 | /* Instruction format */\r |
| 73 | \r |
| 74 | #define I_M_SRC 077 /* source */\r |
| 75 | #define I_V_SRC 10\r |
| 76 | #define I_GETSRC(x) (((x) >> I_V_SRC) & I_M_SRC)\r |
| 77 | #define I_M_OP 017 /* operator */\r |
| 78 | #define I_V_OP 6\r |
| 79 | #define I_GETOP(x) (((x) >> I_V_OP) & I_M_OP)\r |
| 80 | #define I_M_DST 077 /* destination */\r |
| 81 | #define I_V_DST 0\r |
| 82 | #define I_GETDST(x) (((x) >> I_V_DST) & I_M_DST)\r |
| 83 | #define SF_V_REASON 1 /* SF reason */\r |
| 84 | \r |
| 85 | /* IO return */\r |
| 86 | \r |
| 87 | #define IORETURN(f,v) ((f)? (v): SCPE_OK) /* stop on error */\r |
| 88 | \r |
| 89 | /* Operators */\r |
| 90 | \r |
| 91 | #define U_ZERO 000 /* zero */\r |
| 92 | #define U_IR 001 /* instruction reg */\r |
| 93 | #define U_FSK 002 /* func out/skip */\r |
| 94 | #define U_TRP 003 /* trap */\r |
| 95 | #define U_ISR 004 /* intr status */\r |
| 96 | #define U_MA 005 /* mem addr */\r |
| 97 | #define U_MEM 006 /* mem data */\r |
| 98 | #define U_SC 007 /* seq counter */\r |
| 99 | #define U_SWR 010 /* switch register */\r |
| 100 | #define U_AX 011 /* arith in 1 */\r |
| 101 | #define U_AY 012 /* arith in 2 */\r |
| 102 | #define U_AO 013 /* arith out */\r |
| 103 | #define U_EAO 014 /* ext arith */\r |
| 104 | #define U_MSR 017 /* machine status */\r |
| 105 | #define U_XR 022 /* GRI-99: idx reg */\r |
| 106 | #define U_GTRP 023 /* GRI-99: alt trap */\r |
| 107 | #define U_BSW 024 /* byte swap */\r |
| 108 | #define U_BPK 025 /* byte pack */\r |
| 109 | #define U_BCP1 026 /* byte compare 1 */\r |
| 110 | #define U_BCP2 027 /* byte compare 2 */\r |
| 111 | #define U_GR 030 /* hex general regs */\r |
| 112 | #define U_CDR 055 /* card reader */\r |
| 113 | #define U_CADR 057\r |
| 114 | #define U_DWC 066 /* disk */\r |
| 115 | #define U_DCA 067\r |
| 116 | #define U_DISK 070\r |
| 117 | #define U_LPR 071 /* line printer */\r |
| 118 | #define U_CAS 074 /* casette */\r |
| 119 | #define U_RTC 075 /* clock */\r |
| 120 | #define U_HS 076 /* paper tape */\r |
| 121 | #define U_TTY 077 /* console */\r |
| 122 | \r |
| 123 | struct gdev {\r |
| 124 | uint32 (*Src)(uint32); /* source */\r |
| 125 | t_stat (*Dst)(uint32, uint32); /* dest */\r |
| 126 | t_stat (*FO)(uint32); /* func out */\r |
| 127 | uint32 (*SF)(uint32); /* skip func */\r |
| 128 | };\r |
| 129 | \r |
| 130 | /* Trap (jump) */\r |
| 131 | \r |
| 132 | #define TRP_DIR 00 /* direct */\r |
| 133 | #define TRP_DEF 01 /* defer */\r |
| 134 | \r |
| 135 | /* Interrupt status */\r |
| 136 | \r |
| 137 | #define ISR_OFF 01 /* int off */\r |
| 138 | #define ISR_ON 02 /* int on */\r |
| 139 | \r |
| 140 | /* Bus modifiers */\r |
| 141 | \r |
| 142 | #define BUS_COM 002 /* complement */\r |
| 143 | #define BUS_FNC 014 /* function mask */\r |
| 144 | #define BUS_P1 004 /* + 1 */\r |
| 145 | #define BUS_L1 010 /* rotate left */\r |
| 146 | #define BUS_R1 014 /* rotate right */\r |
| 147 | \r |
| 148 | /* Memory address modes */\r |
| 149 | \r |
| 150 | #define MEM_MOD 03\r |
| 151 | #define MEM_DIR 00 /* direct */\r |
| 152 | #define MEM_DEF 01 /* defer */\r |
| 153 | #define MEM_IMM 02 /* immediate */\r |
| 154 | #define MEM_IDF 03 /* immediate defer */\r |
| 155 | \r |
| 156 | /* Arithmetic unit */\r |
| 157 | \r |
| 158 | #define FO_V_FOA 8 /* arith func */\r |
| 159 | #define FO_M_FOA 03\r |
| 160 | #define OP_GET_FOA(x) (((x) >> (FO_V_FOA - I_V_OP)) & FO_M_FOA)\r |
| 161 | #define AO_ADD 00 /* add */\r |
| 162 | #define AO_AND 01 /* and */\r |
| 163 | #define AO_XOR 02 /* xor */\r |
| 164 | #define AO_IOR 03 /* or */\r |
| 165 | #define EAO_MUL 01 /* multiply */\r |
| 166 | #define EAO_DIV 02 /* divide */\r |
| 167 | #define EAO_ARS 03 /* arith rshft */\r |
| 168 | #define EAO_NORM 04 /* normalize */\r |
| 169 | \r |
| 170 | /* Machine status */\r |
| 171 | \r |
| 172 | #define MSR_V_BOV 15 /* bus carry */\r |
| 173 | #define MSR_V_L 14 /* bus link */\r |
| 174 | #define MSR_V_FOA 8 /* arith func */\r |
| 175 | #define MSR_M_FOA 03\r |
| 176 | #define MSR_V_SOV 1 /* arith ovflo */\r |
| 177 | #define MSR_V_AOV 0 /* arith carry */\r |
| 178 | #define MSR_BOV (1u << MSR_V_BOV)\r |
| 179 | #define MSR_L (1u << MSR_V_L)\r |
| 180 | #define MSR_FOA (MSR_M_FOA << MSR_V_FOA)\r |
| 181 | #define MSR_SOV (1u << MSR_V_SOV)\r |
| 182 | #define MSR_AOV (1u << MSR_V_AOV)\r |
| 183 | #define MSR_GET_FOA(x) (((x) >> MSR_V_FOA) & MSR_M_FOA)\r |
| 184 | #define MSR_PUT_FOA(x,n) (((x) & ~(MSR_M_FOA << MSR_V_FOA)) | \\r |
| 185 | (((n) & MSR_M_FOA) << MSR_V_FOA))\r |
| 186 | #define MSR_RW (MSR_BOV|MSR_L|MSR_FOA|MSR_SOV|MSR_AOV)\r |
| 187 | \r |
| 188 | /* Real time clock */\r |
| 189 | \r |
| 190 | #define RTC_OFF 001 /* off */\r |
| 191 | #define RTC_ON 002 /* clock on */\r |
| 192 | #define RTC_OV 010 /* clock flag */\r |
| 193 | #define RTC_CTR 0103 /* counter */\r |
| 194 | \r |
| 195 | /* Terminal */\r |
| 196 | \r |
| 197 | #define TTY_ORDY 002 /* output flag */\r |
| 198 | #define TTY_IRDY 010 /* input flag */\r |
| 199 | \r |
| 200 | /* Paper tape */\r |
| 201 | \r |
| 202 | #define PT_STRT 001 /* start reader */\r |
| 203 | #define PT_ORDY 002 /* output flag */\r |
| 204 | #define PT_IRDY 010 /* input flag */\r |
| 205 | \r |
| 206 | /* Interrupt masks (ISR) */\r |
| 207 | \r |
| 208 | #define INT_V_TTO 0 /* console out */\r |
| 209 | #define INT_V_TTI 1 /* console in */\r |
| 210 | #define INT_V_HSP 2 /* paper tape punch */\r |
| 211 | #define INT_V_HSR 3 /* paper tape reader */\r |
| 212 | #define INT_V_LPR 5 /* line printer */\r |
| 213 | #define INT_V_CDR 7 /* card reader */\r |
| 214 | #define INT_V_CASW 9 /* casette */\r |
| 215 | #define INT_V_CASR 10\r |
| 216 | #define INT_V_RTC 11 /* clock */\r |
| 217 | #define INT_V_DISK 14 /* disk */\r |
| 218 | #define INT_V_NODEF 16 /* nodefer */\r |
| 219 | #define INT_V_ON 17 /* enable */\r |
| 220 | #define INT_TTO (1u << INT_V_TTO)\r |
| 221 | #define INT_TTI (1u << INT_V_TTI)\r |
| 222 | #define INT_HSP (1u << INT_V_HSP)\r |
| 223 | #define INT_HSR (1u << INT_V_HSR)\r |
| 224 | #define INT_LPR (1u << INT_V_LPR)\r |
| 225 | #define INT_CDR (1u << INT_V_CDR)\r |
| 226 | #define INT_CASW (1u << INT_V_CAS1)\r |
| 227 | #define INT_CASR (1u << INT_V_CAS2)\r |
| 228 | #define INT_RTC (1u << INT_V_RTC)\r |
| 229 | #define INT_DISK (1u << INT_V_DISK)\r |
| 230 | #define INT_NODEF (1u << INT_V_NODEF)\r |
| 231 | #define INT_ON (1u << INT_V_ON)\r |
| 232 | #define INT_PENDING (INT_ON | INT_NODEF)\r |
| 233 | \r |
| 234 | /* Vectors */\r |
| 235 | \r |
| 236 | #define VEC_BKP 0000 /* breakpoint */\r |
| 237 | #define VEC_TTO 0011 /* console out */\r |
| 238 | #define VEC_TTI 0014 /* console in */\r |
| 239 | #define VEC_HSP 0017 /* paper tape punch */\r |
| 240 | #define VEC_HSR 0022 /* paper tape reader */\r |
| 241 | #define VEC_LPR 0033 /* line printer */\r |
| 242 | #define VEC_CDR 0033 /* card reader */\r |
| 243 | #define VEC_CASW 0044 /* casette */\r |
| 244 | #define VEC_CASR 0047\r |
| 245 | #define VEC_DISK 0055 /* disk */\r |
| 246 | #define VEC_RTC 0100 /* clock */\r |